英语听力精选进阶版 14499（在线收听）

Ozone layer 'recovering'

Vocabulary

aware

having knowledge of something existing

harm

hurt or injure

UV light

light from the sun humans can't see and which can cause cancer

healing

(here) recovering

warned

alerted about danger

climate change

significant variation in the Earth's temperature

greenhouse gases

carbon dioxide and other gases which cause climate change